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Finding the Fourth Proportional to 71,919.40, 99,184.14 and 45,064.78

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Solution

The fourth proportional to 71,919.40, 99,184.14 and 45,064.78 is: 62,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.40 : 99,184.14 = 45,064.78 : x
  2. Step 2: Convert to fraction form
    71,919.40/99,184.14 = 45,064.78/x
  3. Step 3: Cross multiply
    71,919.40x = 99,184.14 × 45,064.78
  4. Step 4: Simplify right side
    71,919.40x = 4,469,711,448.59
  5. Step 5: Solve for x
    x = 4,469,711,448.59/71,919.40
  6. Step 6: Final answer
    x = 62,148.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.